By K. C. A. Smith
It is a accomplished advent to the idea of electric circuits for college kids within the actual sciences taking a primary direction in electronics. The equipment of circuit research are in actual fact defined and illustrated because of a number of labored examples. purposes of the speculation proper to the fields of electronics, telecommunications and tool platforms are handled all through.
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Additional info for Electrical Circuits: An Introduction
Practical Note Schemes abound for turning off this preload as external load increases. Very frequently, the result is oscillations: the preload turns off, then the converter goes discontinuous, which causes the preload to turn on, and the converter is continuous, causing the preload to turn off, etc. Just bite the bullet and accept the small efficiency hit compared with the cost (and efficiency hit) of a much larger inductor. I Leakage Inductance Unlike the flyback, which uses its primary inductance to store energy, the forward really has parasitic leakage inductance.
Then there are wirewounds. These range in size from tiny 1W packages to mammoth 1kW rheostats (see below for a definition). These resistors are called wirewound because they really are: if you cut one up, you will find a piece of (relatively) high resistance wire, usually wound around a core in a helix pattern. If you think this sounds like the description of a solenoid, that’s because it is: wirewounds have plenty of inductance; as discussed below, it’s also possible, by winding equal numbers of turns in opposite directions to produce a wirewound resistor having very little inductance.
As discussed in Chapter 6, the distinguishing feature of a flyback topology is that the magnetic structure stores energy during a portion of the switching cycle; this is why we use the same name for these two topologies. The Flyback 27 Practical Note Whenever you’re reading something that refers to a “flyback” or “boost,” look carefully at the schematic to see what topology is actually being talked about. The literature is inconsistent, resulting in endless confusion. Continuous versus Discontinuous Both types of flyback can be run in either continuous or discontinuous mode.
Electrical Circuits: An Introduction by K. C. A. Smith